Considering that American district attorneys are elected and not appointed, it would not be beneath them to go after some poor slob in order to score a few “law and justice” brownie points for the next election.

If it were your fiancee, it could be considered ‘Breach of Promise.’ I don’t think anyone has bee prosecuted for that sine the end of the first world war.
Politicians really don’t want the idea of ‘Breach of Promise’ as an actionable offense entering the public psyche.